基于DMSP-OLS夜间灯光数据的中国城市扩张规律研究

A Study of Urban Expansion Feature of China Based on DMSP-OLS Stable Nighttime Light Data

分别以1992年、1998年、2003年、2008年和2013年的DMSP-OLS稳定夜间灯光数据为基础,提取出我国八大综合经济区范围内的城市建成区范围,并从城市面积变化、扩张类型、扩张强度3方面对不同经济区城市扩张特征进行了分析研究。结果表明:北部沿海、东部沿海、南部沿海综合经济区城市扩张相似,其中东部沿海综合经济区是城市扩张最快的综合经济区;东北综合经济区和黄河中游综合经济区在1992~2003年城市扩张缓慢,2003~2013年城市扩张开始加速;长江中游、大西南和大西北3大综合经济区城市扩张速度稳定,但扩张速度较沿海地区较为缓慢。

Based on the stable nighttime light data in 1992, 1998, 2003, and 2013, this paper extracted the urban areas of eight economic zones in China. This paper analyzed the urban expansion laws, expansion types and expansion intensities of the different economic zones during the period of 1992--2013. The results showed that the urban expansion patterns of the northern coastal, eastern coastal and southern coastal economic zones were similar. The eastern coastal comprehensive economic zone is the fastest integrated economic zone in the city. The urban expansions of the northeast economic zone and middle Yellow River economic zone in 1992--2003 were slower but their urban expansion began to speed up after 2003. Meanwhile, the urban expansion rate of the three major integrated economic zones in the middle reaches of the Yangtze River, the Great Southwest and Northwest China was stable, but the expansion rate was slower than that in the coastal areas.